My colleague, George Gontcharov, and I work on creating a 3D reddening map and model within our Galaxy. Also, we compare existing extinction and reddening maps and models among themselves and with our results. In Gotcharov & Mosenkov (2017a,b, 2018, 2019a,b) we show that the Pulkovo 3D reddening map and model can better describe the reddening of stars, especially at high latitudes, than the other maps and models.